<template>
  <el-container class="main-container">
    <!-- 头部区域 -->
    <el-header>
      <!-- 左侧的 logo -->
      <img src="../../assets/images/logo.png" alt="" />
      <!-- 右侧的菜单 -->
      <el-menu
        class="el-menu-top"
        mode="horizontal"
        background-color="#23262E"
        text-color="#fff"
        active-text-color="#409EFF"
      >
        <el-submenu index="1">
          <template slot="title">
            <!-- 头像 -->
            <img src="../../assets/logo.png" alt="" class="avatar" />
            <span>个人中心</span>
          </template>
          <el-menu-item index="1-1"
            ><i class="el-icon-s-operation"></i>基本资料</el-menu-item
          >
          <el-menu-item index="1-2"
            ><i class="el-icon-camera"></i>更换头像</el-menu-item
          >
          <el-menu-item index="1-3"
            ><i class="el-icon-key"></i>重置密码</el-menu-item
          >
        </el-submenu>
        <el-menu-item index="2" @click="logout"
          ><i class="el-icon-switch-button"></i>退出</el-menu-item
        >
      </el-menu>
    </el-header>
    <el-container>
      <!-- 左侧边栏区域 -->
      <el-aside width="200px">
        <div class="user-box">
          <img :src="userInfo.user_pic" alt="" v-if="userInfo.user_pic" />
          <!-- 没有图片显示默认图片 -->
          <img src="../../assets/logo.png" class="avatar" alt="" v-else />
          <span>{{ userInfo.nickname || userInfo.username }}</span>
        </div>
        <!-- 侧边栏导航 -->
                  <!-- $route 当前路由组件的对象 -->
        <el-menu          
          :default-active="$route.path"
          class="el-menu-vertical-demo"
          background-color="#23262E"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          router
        > <!-- 为 `el-menu` 组件添加 `router` 属性，可以开启左侧菜单的路由模式： -->
       
          <!-- 添加模版标签  不能使用key -->
          <template v-for="item in menusList">
            <!-- 不包含子菜单的“一级菜单” -->
            <el-menu-item 
             :index="item.indexPath"
            :key="item.indexPath" 
            v-if="!item.children"
            >
              <i :class="item.icon"> </i>
              {{item.title}}
              </el-menu-item>  

            <!-- 包含子菜单的“一级菜单” -->
            <el-submenu 
             :index="item.indexPath"
             :key="item.indexPath"
             v-else 
             >
              <template slot="title">
                <i :class="item.icon"></i>
                <span>{{item.title}}</span>
              </template>
               <!-- 二级菜单 -->
                <el-menu-item 
                :index="subItem.indexPath" 
                v-for="subItem in item.children" 
                :key="subItem.indexPath">
              <i :class="subItem.icon"></i>{{ subItem.title }}
               </el-menu-item>
            </el-submenu>

          </template>

        </el-menu>
      </el-aside>
      <el-container>
        <!-- 页面主体区域 -->
        <el-main> 
            <!-- 二级路由出口 -->
          <router-view></router-view>
        </el-main>
        <!-- 底部 footer 区域 -->
        <el-footer>© www.itheima.com - 黑马程序员</el-footer>
      </el-container>
    </el-container>
  </el-container>
</template>

<script>
import { mapState } from 'vuex'
export default {
  name: 'Main',
  data() {
    return {
      menusList: []
    }
  },
  //  映射到计算属性
  computed: {
    ...mapState(['userInfo','token'])
  },
  // 调用请求函数
  created() {
     //判断有没有token
     if(this.token){
           this.$store.dispatch('initUserInfo')
    // 调用 渲染页面
    this.initMenus()
     }else{  //没有token  退回登录页
       this.$router.push("/login")
     }
  },
  methods: {
    // 退出登录
    logout() {
      // 询问用户是否退出登录
      this.$confirm('您确认退出登录吗？', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      })
        .then(() => {
          // 1.清空token 2.跳转页面  通过mutations 修改token值 重新赋值为空
          this.$store.commit('updateToken', '')
          // 2.清空userInfo
          this.$store.commit('updateUserInfo', {})
          this.$router.push('/login')
        })
        .catch((err) => err)
    },
    //渲染页面
    async initMenus() {
      const { data: res } = await this.$http.get('/my/menus')
      if (res.code === 0) {
        this.menusList = res.data
      }
    }
  }
}
</script>

<style lang="less" scoped>
.main-container {
  height: 100%;
  .el-header,
  .el-aside {
    background-color: #23262e;
  }
  .el-header {
    padding: 0;
    display: flex;
    justify-content: space-between;
  }
  .el-main {
    overflow-y: scroll;
    height: 0;
    background-color: #f2f2f2;
  }
  .el-footer {
    background-color: #eee;
    font-size: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  // 左侧边栏用户信息区域
  .user-box {
    height: 70px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-top: 1px solid #000;
    border-bottom: 1px solid #000;
    user-select: none;
    img {
      width: 35px;
      height: 35px;
      border-radius: 50%;
      background-color: #fff;
      margin-right: 15px;
      object-fit: cover;
    }
    span {
      color: white;
      font-size: 12px;
    }
  }
  // 侧边栏菜单的样式
  .el-aside {
    .el-submenu,
    .el-menu-item {
      width: 200px;
      user-select: none;
    }
  }
}

.avatar {
  border-radius: 50%;
  width: 35px;
  height: 35px;
  background-color: #fff;
  margin-right: 10px;
  object-fit: cover;
}
</style>
